microscheme/scheme-private.h

/*
 * µscheme
 *
 * Copyright (C) 2015 Marc Alexander Lehmann <uscheme@schmorp.de>
 *                 do as you want with this, attribution appreciated.
 */

/* scheme-private.h */

#ifndef SCHEME_PRIVATE_H
#define SCHEME_PRIVATE_H

#include "scheme.h"

/*------------------ Ugly internals -----------------------------------*/

/*------------------ Of interest only to FFI users --------------------*/

# ifdef __cplusplus
extern "C"
{
# endif

enum scheme_port_kind
{
  port_free = 0,
  port_file = 1,
  port_string = 2,
  port_srfi6 = 4,
  port_input = 16,
  port_output = 32,
  port_saw_EOF = 64
};

typedef struct port
{
  unsigned char kind;
  int16_t unget;
  union
  {
    struct
    {
      int file;
      int closeit;
# if SHOW_ERROR_LINE
      int curr_line;
      char *filename;
# endif
    } stdio;
    struct
    {
      char *start;
      char *past_the_end;
      char *curr;
    } string;
  } rep;
} port;

/* cell structure */
struct cell
{
  union
  {
    struct
    {
      char *svalue;
      uint32_t length;
    } string;

    struct {
      struct cell **vvalue;
      uint32_t length;
    } vector;

    num number;

    port *port;

    foreign_func ff;

    struct
    {
      struct cell *car;
      struct cell *cdr;
    } cons;

  } object;

  uint8_t flag;
};

/* frequently accessed members are near the beginning, reducing codesize esp. on CISC */
struct scheme
{
  /* NIL is the most commonly accessed value */
  struct cell xNIL;           /* special cell representing empty cell */

  /* We use 4 registers. */
  pointer args;               /* register for arguments of function */
  pointer envir;              /* stack register for current environment */
  pointer code;               /* register for current code */
  pointer dump;               /* stack register for next evaluation */

  struct cell xT;             /* special cell representing #t */
  struct cell xF;             /* special cell representing #f */
  struct cell xEOF_OBJ;       /* special cell representing end-of-file object */
  struct cell xsink;          /* when mem. alloc. fails */

  /* arrays for segments */
#ifndef CELL_SEGSIZE
# define CELL_SEGSIZE    128   /* # of cells in one segment */
#endif
#ifndef CELL_NSEGMENT
# define CELL_NSEGMENT   10     /* # of segments for cells */
#endif
  char *alloc_seg[CELL_NSEGMENT];
  pointer cell_seg[CELL_NSEGMENT];
  int cell_segsize[CELL_NSEGMENT];
  int last_cell_seg;

  int interactive_repl;       /* are we in an interactive REPL? */

  pointer oblist;             /* pointer to symbol table */
  pointer global_env;         /* pointer to global environment */
  pointer c_nest;             /* stack for nested calls from C */

  /* global pointers to special symbols */
  pointer LAMBDA;             /* pointer to syntax lambda */
  pointer QUOTE;              /* pointer to syntax quote */

  pointer QQUOTE;             /* pointer to symbol quasiquote */
  pointer UNQUOTE;            /* pointer to symbol unquote */
  pointer UNQUOTESP;          /* pointer to symbol unquote-splicing */
  pointer FEED_TO;            /* => */
  pointer COLON_HOOK;         /* *colon-hook* */
  pointer ERROR_HOOK;         /* *error-hook* */
  pointer SHARP_HOOK;         /* *sharp-hook* */
  pointer COMPILE_HOOK;       /* *compile-hook* */

  pointer free_cell;          /* pointer to top of free cells */
  long fcells;                /* # of free cells */

  /* return code */
  int retcode;
  int tracing;

  pointer inport;
  pointer outport;
  pointer save_inport;
  pointer loadport;

#define MAXFIL 64
  port load_stack[MAXFIL];    /* Stack of open files for port -1 (LOADing) */
  int nesting_stack[MAXFIL];
  int file_i;
  int nesting;

  char gc_verbose;            /* if gc_verbose is not zero, print gc status */
  char no_memory;             /* Whether mem. alloc. has failed */

#define LINESIZE 1024
  char linebuff[LINESIZE];
#define STRBUFFSIZE 256
  char strbuff[STRBUFFSIZE];

  int tmpfp;
  int tok;
  int print_flag;
  pointer value;
  int op;

  void *ext_data;             /* For the benefit of foreign functions */
  long gensym_cnt;

  struct scheme_interface *vptr;
  struct dump_stack_frame *dump_base; /* pointer to base of allocated dump stack */
  int dump_size;                      /* number of frames allocated for dump stack */
};

/* operator code */
enum scheme_opcodes
{
#define OP_DEF(func,name,minarity,maxarity,argtest,op) op,
#include "opdefines.h"
#undef OP_DEF
  OP_MAXDEFINED
};

#define cons(a,b) xcons(SCHEME_A_ a,b,0)
#define immutable_cons(a,b) xcons(SCHEME_A_ a,b,1)

INTERFACE int is_string (pointer p);
INTERFACE char *string_value (pointer p);
INTERFACE int is_number (pointer p);
INTERFACE num nvalue (pointer p);
INTERFACE IVALUE ivalue (pointer p);
INTERFACE RVALUE rvalue (pointer p);
INTERFACE int is_integer (pointer p);
INTERFACE int is_real (pointer p);
INTERFACE int is_character (pointer p);
INTERFACE long charvalue (pointer p);
INTERFACE int is_vector (pointer p);

INTERFACE int is_port (pointer p);

INTERFACE int is_pair (pointer p);
INTERFACE pointer pair_car (pointer p);
INTERFACE pointer pair_cdr (pointer p);
INTERFACE void set_car (pointer p, pointer q);
INTERFACE void set_cdr (pointer p, pointer q);

INTERFACE int is_symbol (pointer p);
INTERFACE char *symname (pointer p);
INTERFACE int hasprop (pointer p);

INTERFACE int is_syntax (pointer p);
INTERFACE int is_proc (pointer p);
INTERFACE int is_foreign (pointer p);
INTERFACE char *syntaxname (pointer p);
INTERFACE int is_closure (pointer p);
#ifdef USE_MACRO
INTERFACE int is_macro (pointer p);
#endif
INTERFACE pointer closure_code (pointer p);
INTERFACE pointer closure_env (pointer p);

INTERFACE int is_continuation (pointer p);
INTERFACE int is_promise (pointer p);
INTERFACE int is_environment (pointer p);
INTERFACE int is_immutable (pointer p);
INTERFACE void setimmutable (pointer p);

#ifdef __cplusplus
}
#endif

#endif

/*
Local variables:
c-file-style: "k&r"
End:
*/
Revision:	1.5
Committed:	Thu Nov 26 21:32:16 2015 UTC (8 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.4:	+10 -9 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.4	/*
2			* µscheme
3			*
4			* Copyright (C) 2015 Marc Alexander Lehmann <uscheme@schmorp.de>
5			* do as you want with this, attribution appreciated.
6			*/
7	root	1.1
8			/* scheme-private.h */
9
10			#ifndef SCHEME_PRIVATE_H
11	root	1.2	#define SCHEME_PRIVATE_H
12	root	1.1
13	root	1.2	#include "scheme.h"
14
15	root	1.1	/------------------ Ugly internals -----------------------------------/
16
17			/------------------ Of interest only to FFI users --------------------/
18
19			# ifdef __cplusplus
20			extern "C"
21			{
22			# endif
23
24			enum scheme_port_kind
25			{
26			port_free = 0,
27			port_file = 1,
28			port_string = 2,
29			port_srfi6 = 4,
30			port_input = 16,
31			port_output = 32,
32			port_saw_EOF = 64
33			};
34
35			typedef struct port
36			{
37			unsigned char kind;
38			int16_t unget;
39			union
40			{
41			struct
42			{
43			int file;
44			int closeit;
45			# if SHOW_ERROR_LINE
46			int curr_line;
47			char *filename;
48			# endif
49			} stdio;
50			struct
51			{
52			char *start;
53			char *past_the_end;
54			char *curr;
55			} string;
56			} rep;
57			} port;
58
59			/* cell structure */
60			struct cell
61			{
62			union
63			{
64			struct
65			{
66			char *svalue;
67	root	1.3	uint32_t length;
68	root	1.1	} string;
69
70	root	1.3	struct {
71			struct cell **vvalue;
72			uint32_t length;
73			} vector;
74
75	root	1.1	num number;
76
77			port *port;
78
79			foreign_func ff;
80
81			struct
82			{
83			struct cell *car;
84			struct cell *cdr;
85			} cons;
86
87			} object;
88
89	root	1.3	uint8_t flag;
90	root	1.1	};
91
92			/* frequently accessed members are near the beginning, reducing codesize esp. on CISC */
93			struct scheme
94			{
95			/* NIL is the most commonly accessed value */
96			struct cell xNIL; /* special cell representing empty cell */
97
98			/* We use 4 registers. */
99			pointer args; /* register for arguments of function */
100			pointer envir; /* stack register for current environment */
101			pointer code; /* register for current code */
102			pointer dump; /* stack register for next evaluation */
103
104			struct cell xT; /* special cell representing #t */
105			struct cell xF; /* special cell representing #f */
106			struct cell xEOF_OBJ; /* special cell representing end-of-file object */
107			struct cell xsink; /* when mem. alloc. fails */
108
109			/* arrays for segments */
110			#ifndef CELL_SEGSIZE
111			# define CELL_SEGSIZE 128 /* # of cells in one segment */
112			#endif
113			#ifndef CELL_NSEGMENT
114			# define CELL_NSEGMENT 10 /* # of segments for cells */
115			#endif
116			char *alloc_seg[CELL_NSEGMENT];
117			pointer cell_seg[CELL_NSEGMENT];
118			int cell_segsize[CELL_NSEGMENT];
119			int last_cell_seg;
120
121			int interactive_repl; /* are we in an interactive REPL? */
122
123			pointer oblist; /* pointer to symbol table */
124			pointer global_env; /* pointer to global environment */
125			pointer c_nest; /* stack for nested calls from C */
126
127			/* global pointers to special symbols */
128			pointer LAMBDA; /* pointer to syntax lambda */
129			pointer QUOTE; /* pointer to syntax quote */
130
131			pointer QQUOTE; /* pointer to symbol quasiquote */
132			pointer UNQUOTE; /* pointer to symbol unquote */
133			pointer UNQUOTESP; /* pointer to symbol unquote-splicing */
134			pointer FEED_TO; /* => */
135			pointer COLON_HOOK; /* colon-hook */
136			pointer ERROR_HOOK; /* error-hook */
137			pointer SHARP_HOOK; /* sharp-hook */
138			pointer COMPILE_HOOK; /* compile-hook */
139
140			pointer free_cell; /* pointer to top of free cells */
141			long fcells; /* # of free cells */
142
143			/* return code */
144			int retcode;
145			int tracing;
146
147			pointer inport;
148			pointer outport;
149			pointer save_inport;
150			pointer loadport;
151
152	root	1.5	#define MAXFIL 64
153	root	1.1	port load_stack[MAXFIL]; /* Stack of open files for port -1 (LOADing) */
154			int nesting_stack[MAXFIL];
155			int file_i;
156			int nesting;
157
158			char gc_verbose; /* if gc_verbose is not zero, print gc status */
159			char no_memory; /* Whether mem. alloc. has failed */
160
161	root	1.5	#define LINESIZE 1024
162	root	1.1	char linebuff[LINESIZE];
163	root	1.5	#define STRBUFFSIZE 256
164	root	1.1	char strbuff[STRBUFFSIZE];
165
166			int tmpfp;
167			int tok;
168			int print_flag;
169			pointer value;
170			int op;
171
172			void ext_data; / For the benefit of foreign functions */
173			long gensym_cnt;
174
175			struct scheme_interface *vptr;
176			struct dump_stack_frame dump_base; / pointer to base of allocated dump stack */
177			int dump_size; /* number of frames allocated for dump stack */
178			};
179
180			/* operator code */
181			enum scheme_opcodes
182			{
183	root	1.5	#define OP_DEF(func,name,minarity,maxarity,argtest,op) op,
184			#include "opdefines.h"
185			#undef OP_DEF
186	root	1.1	OP_MAXDEFINED
187			};
188
189	root	1.5	#define cons(a,b) xcons(SCHEME_A_ a,b,0)
190			#define immutable_cons(a,b) xcons(SCHEME_A_ a,b,1)
191	root	1.1
192			INTERFACE int is_string (pointer p);
193			INTERFACE char *string_value (pointer p);
194			INTERFACE int is_number (pointer p);
195			INTERFACE num nvalue (pointer p);
196			INTERFACE IVALUE ivalue (pointer p);
197			INTERFACE RVALUE rvalue (pointer p);
198			INTERFACE int is_integer (pointer p);
199			INTERFACE int is_real (pointer p);
200			INTERFACE int is_character (pointer p);
201			INTERFACE long charvalue (pointer p);
202			INTERFACE int is_vector (pointer p);
203
204			INTERFACE int is_port (pointer p);
205
206			INTERFACE int is_pair (pointer p);
207			INTERFACE pointer pair_car (pointer p);
208			INTERFACE pointer pair_cdr (pointer p);
209			INTERFACE void set_car (pointer p, pointer q);
210			INTERFACE void set_cdr (pointer p, pointer q);
211
212			INTERFACE int is_symbol (pointer p);
213			INTERFACE char *symname (pointer p);
214			INTERFACE int hasprop (pointer p);
215
216			INTERFACE int is_syntax (pointer p);
217			INTERFACE int is_proc (pointer p);
218			INTERFACE int is_foreign (pointer p);
219			INTERFACE char *syntaxname (pointer p);
220			INTERFACE int is_closure (pointer p);
221	root	1.5	#ifdef USE_MACRO
222	root	1.1	INTERFACE int is_macro (pointer p);
223	root	1.5	#endif
224	root	1.1	INTERFACE pointer closure_code (pointer p);
225			INTERFACE pointer closure_env (pointer p);
226
227			INTERFACE int is_continuation (pointer p);
228			INTERFACE int is_promise (pointer p);
229			INTERFACE int is_environment (pointer p);
230			INTERFACE int is_immutable (pointer p);
231			INTERFACE void setimmutable (pointer p);
232
233	root	1.2	#ifdef __cplusplus
234	root	1.1	}
235	root	1.2	#endif
236	root	1.1
237			#endif
238
239			/*
240			Local variables:
241			c-file-style: "k&r"
242			End:
243			*/